//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2018 Pivotal Software, Inc.
//
//	@filename:
//		CParseHandlerNLJIndexParamList.h
//
//	@doc:
//
//		SAX parse handler class for parsing NLJ ParamList
//---------------------------------------------------------------------------

#ifndef SPQDXL_CParseHandlerNLJIndexParamList_H
#define SPQDXL_CParseHandlerNLJIndexParamList_H

#include "spqos/base.h"

#include "naucrates/dxl/operators/CDXLColRef.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"

namespace spqdxl
{
using namespace spqos;

XERCES_CPP_NAMESPACE_USE

//---------------------------------------------------------------------------
//	@class:
//		CParseHandlerNLJIndexParamList
//
//	@doc:
//		Parse handler for parsing a scalar NLJ ParamList
//
//---------------------------------------------------------------------------
class CParseHandlerNLJIndexParamList : public CParseHandlerBase
{
private:
	BOOL m_is_param_list;

	// array of outer column references
	CDXLColRefArray *m_nest_params_colrefs_array;

	// private copy ctor
	CParseHandlerNLJIndexParamList(const CParseHandlerNLJIndexParamList &);

	// process the start of an element
	void StartElement(
		const XMLCh *const element_uri,			// URI of element's namespace
		const XMLCh *const element_local_name,	// local part of element's name
		const XMLCh *const element_qname,		// element's qname
		const Attributes &attr					// element's attributes
	);

	// process the end of an element
	void EndElement(
		const XMLCh *const element_uri,			// URI of element's namespace
		const XMLCh *const element_local_name,	// local part of element's name
		const XMLCh *const element_qname		// element's qname
	);

public:
	// ctor
	CParseHandlerNLJIndexParamList(CMemoryPool *mp,
								   CParseHandlerManager *parse_handler_mgr,
								   CParseHandlerBase *parse_handler_root);

	// dtor
	virtual ~CParseHandlerNLJIndexParamList();

	// return param column references
	CDXLColRefArray *
	GetNLParamsColRefs() const
	{
		return m_nest_params_colrefs_array;
	}
};

}  // namespace spqdxl
#endif	// SPQDXL_CParseHandlerNLJIndexParamList_H

//EOF
